Safety
The PKF 2000 I series DC/DC power modules are designed in
accordance with EN 60 950, Safety of information technology
equipment including electrical business equipment. SEMKO certificate
no. 9738248.
The PKF power modules are recognized by UL and meet the
applicable requirements in UL 1950 Safety of information technology
equipment, the applicable Canadian safety requirements and UL
1012 Standard for power supplies.
The DC/DC power module shall be installed in an end-use
equipment and considerations should be given to measuring the
case temperature to comply with TCmax when in operation.
Abnormal component tests are conducted with the input
protected by an external 3 A fuse. The need for repeating these
tests in the end-use appliance shall be considered if installed in a
circuit having higher rated devices.
The isolation is an operational insulation in accordance with
EN 60 950.
The DC/DC power module is intended to be supplied by isolated
secondary circuitry and shall be installed in compliance with the
requirements of the ultimate application. One pole of the input
and one pole of the output is to be grounded or both are to be
kept floating.
The terminal pins are only intended for connection to mating
connectors of internal wiring inside the end-use equipment.
These DC/DC power modules may be used in telephone
equipment in accordance with paragraph 34 A.1 of UL 1459
(Standard for Telephone Equipment, second edition).
The galvanic isolation is verified in an electric strength test. Test
voltage (VISO) between input and output is 1,500 Vdc for
60 s. In production the test duration is decreased to 1 s.
The capacitor between input and output has a value of 1 nF and
the leakage current is less than 1µA @ 26 Vdc.
The case is designed in non-conductive epoxy. Its flamma-bility
rating meets UL 94V-0. The oxygen index is 34%.
Electrical Data
Fundamental circuit diagram, Single output
17
10
1
2
Control
11
8
9
18
7
EN/LZT 146 31 R1A (Replaces EN/LZT 137 21 R6) © Ericsson Microelectronics AB, June 2000
5
ERICSSON [ ERICSSON ]
